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Frontline Spot On Combo For Large Dogs 20-40 kg can used against infestations with fleas, ticks and biting lice. It eliminates fleas within 24 hours, ticks within 48 hours and lice within 48 hours. Each treatment of Frontline Spot On Combo for dogs will eliminate adult fleas for up to 8 weeks and ticks for 4 weeks. The application will also inhibit the development of flea larvae and eggs for 8 weeks which will prevent infestation of the home as well as the animal.

How does Frontline Spot On Combo For Large Dogs 20-40 kg?

Frontline Spot On Combo For Large Dogs 20-40 kg acts by direct contact with parasites and not via your pets bloodstream. It kills fleas within 24 hours without requiring them to bite your pet.

1.Frontline Spot On Combo For Large Dogs 20-40 kg is applied externally to your pets skin on the back of the neck.

2.The active ingredient, fipronil, quickly dissolves into the natural oils of your pets skin and coat, dispersing over the entire body surface within 24 hours and concentrating in the skin's oil glands to form a reservoir.

3.Fipronil is then secreted with the natural oils of the skin and hair, continuously coating your pets skin and hair for several weeks after application in fact its the longest-lasting spot on flea treatment.